* { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
            max-width: 100vw;
            overflow-x: hidden;
        }
        a { color: #2c5282; text-decoration: none; transition: color 0.3s ease; }
        a:hover { color: #1a365d; text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { padding-left: 1.5em; margin: 1em 0; }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        .mt-4 { margin-top: 2rem; }
        .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
        .py-4 { padding-top: 2rem; padding-bottom: 2rem; }
        .font-bold { font-weight: 700; }
        .text-primary { color: #2c5282; }
        .bg-light { background-color: #f1f5f9; }
        .shadow { box-shadow: 0 4px 12px rgba(0,0,0,0.08); }
        .rounded { border-radius: 8px; }
        .btn {
            display: inline-block;
            padding: 10px 24px;
            background: #2c5282;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease, transform 0.2s ease;
        }
        .btn:hover {
            background: #1a365d;
            transform: translateY(-2px);
            text-decoration: none;
        }
        .btn i { margin-right: 8px; }
        .site-header {
            background: linear-gradient(135deg, #1a365d 0%, #2c5282 100%);
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        .my-logo {
            font-size: 2.2rem;
            font-weight: 900;
            font-family: Georgia, serif;
            color: #ffdd00;
            text-shadow: 2px 2px 0 #1a365d;
            letter-spacing: 1px;
        }
        .my-logo:hover { text-decoration: none; color: #ffea00; }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.8rem;
            cursor: pointer;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 1.8rem;
        }
        .main-nav a {
            color: white;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.5rem 0;
            border-bottom: 2px solid transparent;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #ffdd00;
            border-bottom-color: #ffdd00;
            text-decoration: none;
        }
        .breadcrumb {
            background: #e2e8f0;
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb ol {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            margin: 0 10px;
            color: #64748b;
        }
        .breadcrumb a { color: #475569; }
        .hero {
            background: linear-gradient(rgba(44, 82, 130, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1610890716171-6b1bb98ffd09?ixlib=rb-4.0.3&auto=format&fit=crop&w=1200&q=80') center/cover no-repeat;
            color: white;
            padding: 4rem 0;
            margin-bottom: 2rem;
        }
        .hero h1 {
            font-size: 3.2rem;
            margin-bottom: 1rem;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
        }
        .hero p.lead {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.95;
        }
        .search-box {
            max-width: 600px;
            margin: 2rem auto;
            padding: 1.5rem;
            background: white;
        }
        .search-form {
            display: flex;
        }
        .search-input {
            flex: 1;
            padding: 14px 20px;
            border: 2px solid #cbd5e1;
            border-right: none;
            border-radius: 6px 0 0 6px;
            font-size: 1rem;
        }
        .search-btn {
            background: #10b981;
            color: white;
            border: none;
            padding: 0 24px;
            border-radius: 0 6px 6px 0;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }
        .search-btn:hover { background: #0da271; }
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 3rem;
            padding: 2rem 0;
        }
        article { background: white; padding: 2.5rem; border-radius: 12px; }
        .article-meta {
            display: flex;
            justify-content: space-between;
            color: #64748b;
            font-size: 0.9rem;
            border-bottom: 1px solid #e2e8f0;
            padding-bottom: 1rem;
            margin-bottom: 2rem;
        }
        .update-time { color: #ef4444; font-weight: 600; }
        h1 { font-size: 2.8rem; color: #1a365d; margin-bottom: 1.5rem; line-height: 1.2; }
        h2 { font-size: 2rem; color: #2c5282; margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid #e2e8f0; }
        h3 { font-size: 1.6rem; color: #334155; margin: 2rem 0 1rem; }
        h4 { font-size: 1.3rem; color: #475569; margin: 1.5rem 0 0.8rem; }
        p { margin-bottom: 1.2rem; text-align: justify; }
        .intro { font-size: 1.15rem; font-weight: 500; color: #1e293b; }
        .highlight-box {
            background: #f0f9ff;
            border-left: 5px solid #0ea5e9;
            padding: 1.5rem;
            margin: 2rem 0;
        }
        .inline-img {
            float: right;
            margin: 0 0 1rem 2rem;
            max-width: 400px;
            border-radius: 8px;
        }
        .quote {
            font-style: italic;
            border-left: 4px solid #fbbf24;
            padding-left: 1.5rem;
            margin: 2rem 0;
            color: #4b5563;
        }
        .link-list {
            columns: 2;
            column-gap: 2rem;
            margin: 2rem 0;
        }
        .link-list li { margin-bottom: 0.7rem; break-inside: avoid; }
        .sidebar-widget {
            background: white;
            padding: 1.5rem;
            margin-bottom: 2rem;
            border-radius: 10px;
        }
        .sidebar-widget h3 {
            font-size: 1.3rem;
            color: #1a365d;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #e2e8f0;
        }
        .comment-form, .rating-form {
            background: white;
            padding: 2rem;
            margin-top: 3rem;
            border-radius: 10px;
        }
        .form-group { margin-bottom: 1.5rem; }
        label { display: block; margin-bottom: 0.5rem; font-weight: 600; color: #374151; }
        input[type="text"],
        input[type="email"],
        textarea,
        select {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #d1d5db;
            border-radius: 6px;
            font-size: 1rem;
            transition: border 0.3s ease;
        }
        input:focus, textarea:focus, select:focus {
            outline: none;
            border-color: #3b82f6;
        }
        .star-rating {
            display: flex;
            gap: 10px;
            font-size: 2rem;
            color: #d1d5db;
            cursor: pointer;
        }
        .star-rating .star:hover,
        .star-rating .star.active {
            color: #fbbf24;
        }
        .site-footer {
            background: #1a202c;
            color: #cbd5e0;
            padding: 3rem 0 1.5rem;
            margin-top: 4rem;
        }
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        .footer-logo { font-size: 2rem; color: #ffdd00; margin-bottom: 1rem; }
        friend-link {
            display: inline-block;
            background: #2d3748;
            color: #90cdf4;
            padding: 8px 16px;
            border-radius: 20px;
            margin: 0 10px 10px 0;
            transition: all 0.3s ease;
        }
        friend-link:hover {
            background: #4a5568;
            color: white;
            text-decoration: none;
        }
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid #4a5568;
            font-size: 0.9rem;
            color: #a0aec0;
        }
        @media (max-width: 992px) {
            .main-content { grid-template-columns: 1fr; }
            .inline-img { float: none; margin: 1rem auto; max-width: 100%; }
        }
        @media (max-width: 768px) {
            .mobile-toggle { display: block; }
            .main-nav {
                width: 100%;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.5s ease;
            }
            .main-nav.active {
                max-height: 300px;
                margin-top: 1rem;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li { width: 100%; }
            .main-nav a {
                display: block;
                padding: 0.8rem 0;
                border-bottom: 1px solid rgba(255,255,255,0.1);
            }
            .hero h1 { font-size: 2.5rem; }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            article { padding: 1.5rem; }
            .link-list { columns: 1; }
        }